A Black star, or a dwarf star is commonly refered to as a star that is 'fading'. In fact, the star is starting to burn out as stars are like the sun, only smaller. They are small burning balls of gas.
a white dwarf
The closest known Star to our sun is Proxima Centauri, a small dim red dwarf star around 4.2 light years away.
White Dwarf Stars are very hot, like a ball of fire. They are dim because they are small and very far away.
I assume you mean a DWARF STAR. There are different types of dwarf stars; the white dwarfs are fairly hot - but the reason they are dim is that they have a very small surface area.
A cold dead star is called a white dwarf. It is formed when a star has exhausted its nuclear fuel and collapsed under gravity, shrinking to a small, dense, and dim object.
stars that are dim probably have both a small mass and a larger radius.
This describes a white dwarf, which is a small, dense star that remains after a star has exhausted its nuclear fuel and shed its outer layers. White dwarfs emit heat and light as they slowly cool down over billions of years.
no
It depends on the size. Small, dim stars live much, much longer than large, bright ones. The expected lifetime of a star like the Sun as a main-sequence star is about 10 billion years.
A red dwarf star is hard to see because those stars are small and dim, their low luminosity made them hard to observe.
The sun IS a star, and it is a moderately small one. It is a middle-temperature, stable yellow star which is actually quite small and dim when compared with many other stars. On the H-R diagram, which classifies stars according to temperature and spectral type (color), our sun is a type G2 star. In apparent size, as seen from Earth, the sun of course appears so much larger because it is so close. You have to realize that the stars we see at night are extremely distant, so they all appear as pinpoints of light even in strong telescopes. However, the sun is a star, it is not a unique astronomical entity, and it is a dim, yellow dwarf star that is much cooler and much smaller than most of the stars we see at night. Our sun would be too small and dim to be seen with the naked eye from a planet orbiting a star a few hundred light years away from us.
No; actually, white dwarves are rather dim.